Using a Nest thermostat is one of the most convenient ways to improve the everyday schedule of your heating and cooling. This smart thermostat can recognize your preferences and automatically make changes. But as you may expect, it won’t work correctly or at all if you see an error code appear. The specific error code offers useful information about the root of the problem, something a professional technician can use to provide solutions that much quicker.
Let’s consider seven of the most likely error codes you could find on your Nest thermostat. We’ll review the basics of each error code along with how you might solve it and the estimated cost to do so. Keep in mind that while the price will ultimately hinge on the precise Nest model, you can anticipate paying between $75-$200 for repairs. This should include travel and labor costs on top of any specific components required to complete repairs.
e298 – Critical
This critical error code is limited to the latest models of the Nest thermostat and appears when the power is shut off. Since this is a critical power error, the thermostat will swap to the backup battery system. The error message will remain on display until the issue is dealt with.
Losing power to your Nest thermostat can be for several reasons. The wiring may have disconnected or become damaged, or a disconnection may have appeared further along in your electrical system. This might be the circuit breaker, fuse box or system switch. A certified technician should check electrical connections and wiring until they locate the root of the problem.
e294 – Critical
Critical error code e294 shows up when your Nest thermostat’s wiring should be reconfigured. More specifically, the technician will need to reconfigure the R wire. They’ll first conduct a factory reset of your thermostat to ensure it’s not just a software issue. If that doesn’t work, they’ll examine the wiring diagram of the thermostat and start checking connectors.
They’ll detach the power and progressively look at each wire, ensuring they are fully attached into the connector with the correct amount of exposed copper. When they pinpoint the damaged connector, it can be swapped for a new one.
e195 – Critical
This critical error code can surface when the weather outside is particularly hot. The HVAC system can break down and stop giving power to your Nest thermostat. When this problem persists, the backup battery in your thermostat drains and the thermostat will finally turn off. Presuming the breakers are on, you can examine a few other places before calling a professional technician.
As this error can deplete your thermostat’s battery, the first step could be providing enough power to figure out if this specific error code is what you’re facing. You can separate the thermostat from its base and provide power by using a USB cable. If it presents error code 195, you may continue to visually inspect components including the wiring as well as your air conditioner’s air filter or drainage system. If you don’t uncover anything wrong with these components, it will likely be best to get in touch with a pro.
e103 – Critical
Another critical error code, e103 suggests an electrical issue with your Nest thermostat. More specifically, e103 will refer to an overcurrent problem, which means the wiring is getting more power than necessary. This can stem from the breaker box, an error from the control board or through a defective connection in the thermostat. The technician should carefully examine and test the Nest’s electrical system to understand where the power is surging or why the thermostat is convinced there’s an overcurrent problem.
n260
Even though this error code isn’t critical, it might still prevent you from using the Nest thermostat like normal. Error code n260 refers to the lack of a C wire or Nest Power Connector, as missing one can block your Nest from getting enough power. You can inspect the Nest’s C connector for the presence of a C wire and modify the wiring itself if there is. If not, you’ll need a Nest Power Connector.
Due to installation of a Nest Power Connector, you might notice error code E297 show up. This can be resolved by updating your thermostat in Settings -> Software -> Update. If the Power Connector is already installed, you’ll instead be required to update the wiring info in the app from Settings -> Thermostat -> Wiring -> Update wiring.
e104 – Critical
Similar to error code e103, e104 is a critical error originating from an overcurrent. If excessive power is transported using the Nest’s wiring, it could damage internal components and could even be a fire hazard. If you see this error code show up on your Nest thermostat and want to guard against electrical damage, it’s suggested to switch the power off straightaway. You can then get a hold of a professional technician with the appropriate experience detecting and solving electrical issues.
e73 – Critical
When your thermostat displays error code e73, it signifies that the Rc wire is not receiving power.
This may be as simple as the breaker being turned off, but it may also be something with the wiring. After turning off the power to your HVAC system and thermostat, you can visually inspect the wires to make sure they’re not loose or damaged. If nothing appears to be out of place, it’s time to contact a local professional.